<!DOCTYPE html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<title>CanvasLayer</title>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=3.0&ak=IjOcL3u9casXr7TIi08ucM7PGvAEyDbs"></script>
<style type="text/css">
body, html,#container {width: 100%;height: 100%;overflow: hidden;margin:0;font-family:"微软雅黑";}
</style>
</head>
<body>
    <div id="container"></div>
</body>
</html>
<script type="text/javascript">
    var mp = new BMap.Map("container");
    mp.centerAndZoom(new BMap.Point(112.043393,32.004372), 10);
    mp.enableScrollWheelZoom();

    var canvasLayer = new BMap.CanvasLayer({
        update: update
    });
    function G(id) {
        return document.getElementById(id);
    }
    function update() {
        var ctx = this.canvas.getContext("2d");

        if (!ctx) {
            return;
        }

        ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);

        var temp = {};
        ctx.fillStyle = "rgba(50, 50, 255, 0.7)";
        ctx.beginPath();
        /*var data = [
            new BMap.Point(112.043393,32.004372),
            new BMap.Point(112.043393,32.004372),
            new BMap.Point(112.043393,32.004372)
        ];

        for (var i = 0, len = data.length; i < len; i++) {
            var pixel = mp.pointToPixel(data[i]);
            ctx.fillRect(pixel.x, pixel.y, 30, 30);
        }*/
    }

    // 定义一个控件类,即function
    function ZoomControl() {
        this.defaultAnchor = BMAP_ANCHOR_TOP_LEFT;
        this.defaultOffset = new BMap.Size(10, 10);
    }

    // 通过JavaScript的prototype属性继承于BMap.Control
    ZoomControl.prototype = new BMap.Control();

    // 自定义控件必须实现自己的initialize方法,并且将控件的DOM元素返回
    // 在本方法中创建个div元素作为控件的容器,并将其添加到地图容器中
    ZoomControl.prototype.initialize = function(map){
        // 创建一个DOM元素
        var div = document.createElement("div");
        div.innerHTML = '<div id="r-result">' +
            '<input type="text" id="suggestId" size="20" value="百度" style="width:300px;height:35px;" placeholder="请输入地址" />' +
            '</div><div id="searchResultPanel" style="border:1px solid #C0C0C0;width:150px;height:auto; display:none;"></div>';

        // 添加DOM元素到地图中
        mp.getContainer().appendChild(div);
        // 将DOM元素返回
        return div;
    }

    // 创建控件
    var myZoomCtrl = new ZoomControl();
    // 添加到地图当中
    mp.addControl(myZoomCtrl);


    var ac = new BMap.Autocomplete(    //建立一个自动完成的对象
        {"input" : "suggestId"
            ,"location" : mp
        });

    ac.addEventListener("onhighlight", function(e) {  //鼠标放在下拉列表上的事件
        var str = "";
        var _value = e.fromitem.value;
        var value = "";
        if (e.fromitem.index > -1) {
            value = _value.province +  _value.city +  _value.district +  _value.street +  _value.business;
        }
        str = "FromItem<br />index = " + e.fromitem.index + "<br />value = " + value;

        value = "";
        if (e.toitem.index > -1) {
            _value = e.toitem.value;
            value = _value.province +  _value.city +  _value.district +  _value.street +  _value.business;
        }
        str += "<br />ToItem<br />index = " + e.toitem.index + "<br />value = " + value;
        G("searchResultPanel").innerHTML = str;
    });

    var myValue;
    ac.addEventListener("onconfirm", function(e) {    //鼠标点击下拉列表后的事件
        var _value = e.item.value;
        myValue = _value.province +  _value.city +  _value.district +  _value.street +  _value.business;
        G("searchResultPanel").innerHTML ="onconfirm<br />index = " + e.item.index + "<br />myValue = " + myValue;

        setPlace();
    });

    function setPlace(){
        mp.clearOverlays();    //清除地图上所有覆盖物
        function myFun(){
            var pp = local.getResults().getPoi(0).point;    //获取第一个智能搜索的结果
            mp.centerAndZoom(pp, 14);
            mp.addOverlay(new BMap.Marker(pp));    //添加标注
        }
        var local = new BMap.LocalSearch(mp, { //智能搜索
            onSearchComplete: myFun
        });
        local.search(myValue);

    }


      var pt = new BMap.Point(112.043393,32.004372);
    var myIcon = new BMap.Icon("http://lbsyun.baidu.com/jsdemo/img/fox.gif", new BMap.Size(300,157));
    var marker2 = new BMap.Marker(pt,{icon:myIcon});  // 创建标注
    mp.addOverlay(marker2);              // 将标注添加到地图中



    mp.addOverlay(canvasLayer);

</script>
